Electronic device with screen protector

ABSTRACT

An electronic device is described. The electronic device may include a shell, a screen mounted in the shell, a screen protector connected to the shell and arranged at a periphery of the screen and a controller received in the housing and electrically connected with a sensor configured to detect whether the is getting close toward an object at a speed greater than a preset value. An inner surface of the screen protector contacts with an outer side surface of the screen, the screen protector may be configured to stretch or retract relative to the screen such that the screen protector moves between a stretchable state and a retractable state. When the screen is getting close toward an object at the speed greater than the preset value, the controller may be configured to control the screen protector to stretch relative to the screen and be in the stretchable state such that the screen protector touches the object to protect the screen from touching the object.

CROSS REFERENCE TO RELATED APPLICATIONS

This application claims priorities to Chinese Patent Application No.201711204841.4, filed on Nov. 27, 2017, and Chinese Patent ApplicationNo. 201721611250.4, filed on Nov. 27, 2017, the contents of which areherein incorporated by reference in their entireties.

TECHNICAL FIELD

The described embodiments relate to electronic devices and in particularto an electronic device with a screen protector.

BACKGROUND

Electronic devices, such as mobile phones, tablet PCs, intelligentwearable equipment, are widely used in our daily life. Physical hazardsincluding dropping, shock, compression and impact may lead to potentialloss or damage to the electronic device easily. Especially, exposing, ofa screen of the electronic device, to the external environment mayincrease the risk of damage due to accident.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to make the technical solution described in the embodiments ofthe present disclosure more clear, the drawings used for the descriptionof the embodiments will be briefly described. Apparently, the drawingsdescribed below are only for illustration but not for limitation. Itshould be understood that, one skilled in the art may acquire otherdrawings based on these drawings, without making any inventive work.

FIG. 1 is a schematic view of an exemplary electronic device accordingto one embodiment of the present disclosure.

FIG. 2 is an exploded view of the electronic device of FIG. 1.

FIG. 3 is a partly exploded view of the electronic device of FIG. 1,wherein a screen is mounted in a housing of FIG. 1.

FIG. 4 is a right view of the electronic device in FIG. 1 in anon-falling state.

FIG. 5 is a right view of the electronic device in FIG. 1 in a fallingstate.

FIG. 6 is a partial cross-sectional view of the electronic device inFIG. 4.

FIG. 7 is a partial cross-sectional view of the electronic device inFIG. 5.

FIG. 8 is a partial cross-sectional view of the electronic device whenthe electronic device falls to the floor according to one embodiment ofthe present disclosure.

FIG. 9 is a schematic view of an exemplary electronic device accordingto another embodiment of the present disclosure.

FIG. 10 is a right view of the exemplary electronic device in FIG. 9 inthe falling state.

FIG. 11 is a perspective view of the housing of an exemplary electronicdevice assembled with a drive assembly and locking mechanisms accordingto one embodiment of the present disclosure.

FIG. 12 is an exploded view of the housing with a drive assembly andlocking mechanisms in FIG. 11.

FIG. 13 is an exploded view of the screen protector with the driveassembly and locking mechanisms according to one embodiment of thepresent disclosure.

FIG. 14 is a cross-sectional view of the exemplary electronic device inFIG. 1 taken along a line XIV-XIV thereof.

FIG. 15 is an enlarged view of circle A in FIG. 14.

FIG. 16 is a schematic view of the drive assembly according to anotherembodiment of the present disclosure.

FIG. 17 is a cross-sectional view of the exemplary electronic device inFIG. 1 taken along a line XVII-XVII thereof.

FIG. 18 is an enlarged view of circle B in FIG. 17.

FIG. 19 is a cross-sectional view of the exemplary electronic device inFIG. 1 taken along a line XIX-XIX thereof.

FIG. 20 is a side view of the screen protector according to oneembodiment of the present disclosure.

FIG. 21 is a perspective view of a sealing element of the exemplaryelectronic device according to one embodiment of the present disclosure.

FIG. 22 is a side view of the sealing element of FIG. 21.

FIG. 23 is a schematic view of connection relationship between a sensorand a controller of the exemplary electronic device according to oneembodiment of the present disclosure.

FIG. 24 is a flow chart of a method for protecting a screen of theelectronic device according to one embodiment of the present disclosure.

FIG. 25 is a flow chart of a method for protecting a screen of theelectronic device according to another embodiment of the presentdisclosure.

DETAILED DESCRIPTION

Below embodiments of the disclosure will be described in detail,examples of which are shown in the accompanying drawings, in which thesame or similar reference numerals have been used throughout to denotethe same or similar elements or elements serving the same or similarfunctions. The embodiments described below with reference to theaccompanying drawings are exemplary only, meaning they are intended tobe illustrative of rather than limiting the disclosure.

In the specification of the present disclosure, it is to be understoodthat terms such as “central”, “longitudinal”, “lateral”, “length”,“width”, “thickness”, “upper”, “lower”, “front”, “rear”, “left”,“right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”,“clockwise”, “counterclockwise”, “axial”, “radial”, and “circumference”refer to the orientations and locational relations illustrated in thedrawings, and for describing the present disclosure and for describingin a simple manner, and which are not intended to indicate or imply thatthe device or the elements are disposed to locate at the specificdirections or are structured and performed in the specific directions,which could not to be understood as limiting the present disclosure.

In addition, terms such as “first” and “second” are used herein forpurposes of description and are not intended to indicate or implyrelative importance or significance or to imply the number of indicatedtechnical features. Thus, the feature defined with “first” and “second”may include one or more of such a feature. In the description of thepresent disclosure, “a plurality of” means two or more than two, unlessspecified otherwise. Moreover, the terms “comprise”, “include” or anyother variations thereof are meant to cover non-exclusive including, sothat the process, method, article or device comprising a series ofelements do not only comprise those elements, but also comprise otherelements that are not explicitly listed or also comprise the inherentelements of the process, method, article or device. In the case thatthere are no more restrictions, an element qualified by the statement“comprises a . . . ” does not exclude the presence of additionalidentical elements in the process, method, article or device thatcomprises the said element.

In the present disclosure, unless specified or limited otherwise, terms“mounted”, “connected”, “coupled”, “fixed”, and the like are used in abroad sense, and may include, for example, fixed connections, detachableconnections, or integral connections; may also be mechanical orelectrical connections; may also be direct connections or indirectconnections via intervening structures; may also be inner communicationsof two elements, as can be understood by those skilled in the artdepending on specific contexts.

In the following, an electronic device provided in embodiments of thepresent disclosure will be described with reference to drawings.

The electronic device may include mobile phones, tablet PCs, intelligentwearable equipments, etc. It should be understood that “electronicdevice” in this disclosure can include, but not limited to, an apparatusreceiving/transmitting communication signals via wired connection, forexample, public switched telephone network (PSTN), digital subscriberline (DSL), digital cable, electric cable and/or another dataconnection/network, and/or cellular network, Wireless Area Networks(WLAN), digital television network such as DVB-H (Digital VideoBroadcasting Handheld) network, satellite network, AM-FM broadcasttransmitter and/or another communication terminal of wireless interface.The electronic device may include a satellite or cellular telephone, apersonal communication system terminal with cellular radio telephone anddata processing, facsimile and data communication, beeper, or otherelectronic apparatuses with a transceiver.

Please referring to FIGS. 1-2, the electronic device, according to anexemplary embodiment, may include a housing 10, a screen 20 received inthe housing 10 and a screen protector 30 connected to the housing 10 andarranged at a circumference of the screen 20.

The housing 10, which may sometimes be referred to as a case or a shell,may be formed of plastic, glass, ceramics, fiber composites, metal(e.g., stainless steel, aluminum, etc.), other suitable materials, or acombination of these materials. In some situations, parts of housing 10may be formed from dielectric or other low-conductivity material. Inother situations, the housing 10 or at least some of the structures thatmake up the housing 10 may be formed from metal elements.

In one embodiment, the housing 10 may have a rectangular configuration.Alternatively, the housing 10 may have other configurations, such asround, long round and ellipse etc. The housing 10 may define a chamber12 to receive the screen 20. In one embodiment, a sealing element 60, amain board 70 and other components such as a battery, a camera assemblyetc. may also be received in the chamber 12. In particularly, thesealing element 60, the main board 70 and other components may bearranged between the screen 20 and the housing 10. The housing 10 mayinclude a bottom surface 14 opposite to the chamber 12. Patterns, suchas a logo, may be provided on the bottom surface 14 of the housing 10,which can improve identification and appearance of the electronicdevice. In some embodiments, an antenna slot (not shown) may be definedin the housing 10, and it may be communicated with an antenna componentinside the shell assembly 10.

The screen 20, according to an exemplary embodiment, may be configuredto display images and include pixels formed from light-emitting diodes(LEDs), organic LEDs (OLEDs), plasma cells, electrowetting pixels,electrophoretic pixels, liquid crystal display (LCD) components, orother suitable pixel structures. A screen cover layer such as a layer ofclear glass or plastic may cover the surface of the screen 20 or theoutermost layer of the screen 20 may be formed from a color filterlayer, thin-film transistor layer, or other display layer. In thisembodiment, the screen 20 may further incorporate touch electrodes andbe used as a touch screen for inputting information.

The screen 20 of this embodiment may have a rectangular configuration.Alternatively, the screen 20 may have other configurations in otherembodiments. Furthermore, the screen 20 may be flat and include a bottomsurface 22 near the bottom surface 14 of the housing 10, a top surface24 far away from the bottom surface 14 of the housing 10 and an outerside surface 26 connecting between the bottom surface 22 and the topsurface 24. The screen 20 may include display area and non-display area.

The screen protector 30, according to an exemplary embodiment, may bemade of plastic or metal such as stainless steel, aluminum, or othersuitable materials and is configured to absorb the impact energy thatmay lead to damage. Referring to FIG. 3, the screen protector 30 may bepresented as a frame being made in one piece and including an innersurface 31. The screen protector 30 may have a similar configuration asthe screen 20. In one embodiment, the screen protector 30 may bearranged at the same side of the housing 10 as the screen 20 and at aperiphery of the screen 20 and surround the screen 20. The periphery ofthe screen 20 may be an area outside of the screen 20 and surroundingthe screen 20. The inner surface 31 of the screen protector 30 maycontact with the outer side surface 26 of the screen 20. The screenprotector 30 may have a rectangular configuration and include four sidewalls connected with each other end to end, which make the manufacturingof the screen protector 30 more convenience, thereby reducing cost ofproduction. Alternatively, the screen protector 30 may include one ortwo of the four side walls attached to the screen 20 at its side(s). Inother embodiments, the screen protector 30 may have long round, round orother configurations, which is not limited herein. The screen protector30 may include a top surface 32 and a bottom surface 34 opposite to thetop surface 32 along a direction substantially perpendicular to thescreen 20. The top surface 32 of the screen protector 30 may be fartherfrom the bottom surface 14 of the housing 10 than the bottom surface 34of the screen protector 30.

The screen protector 30 may be capable of stretching or retractingrelative to the screen 20 such that the screen protector 30 could bemoveable between a stretchable state and a retractable state. In thisembodiment, the screen protector 30 may protect the screen 20 in amanner of switching from the retractable state to the stretchable state.Specifically, referring to FIG. 4, when the screen 20 is in a normalstate, such as a non-falling state, the screen protector 30 may be inthe retractable state. Referring to FIG. 5, when the screen 20 is in anabnormal state, such as getting close toward an object at a speedgreater than a preset value, such as, a floor, a chair etc., the screenprotector 30 may be configured to stretch relative to the screen 20 andbe in the stretchable state such that the screen protector 30 touchesthe object to prevent the screen 20 from touching the object. The presetvalue may be about a speed when the electronic device falls onto thefloor. In this way, impact energy from the object is redirected from thescreen 20 to the screen protector 30, so as to protect the screen 20from being impacted by the object directly, thereby protecting thescreen 20 effectively and reducing loss in economy. It should be notedthat the abnormal state may be a state when the electronic device isgetting close toward the object at a speed greater than the presetvalue, for example, the electronic device is falling down toward afloor, or being thrown toward a wall. The normal state may be a statewhen the electronic device is not getting close toward the object at aspeed greater than the preset value, i.e. the electronic device isstatic or getting close toward the object at a speed less than thepreset value, for example, the electronic device is hold in one's hand,or placed on a support. In this embodiment, a falling state may be takenas an example of the abnormal state, and a non-falling state may betaken as an example of the normal state.

More specifically, please referring to FIG. 6, when the electronicdevice is in the non-falling state, i.e. a normal state, the screenprotector 30 may be below the screen 20, that is, the bottom surface 34of screen protector 30 may contact with the housing 10, a first distanced1 from the top surface 24 of the screen protector 30 to the bottomsurface 14 of the housing 10 may be less than a second distance d2 fromthe top surface 24 of the screen 20 to the bottom surface 14 of thehousing 10, that is, d1<d2. A difference between d1 and d2 may be about0.2 mm. In other embodiments, the screen protector 30 may be leveledwith the screen 20 when the electronic device is in the non-fallingstate, that is d1=d2.

Referring to FIGS. 7 and 8, when the electronic device is in the fallingstate, i.e. a non-normal state, the screen protector 30 may be above thescreen 20, that is, the bottom surface 34 of screen protector 30 may bedetached from the housing 10 along a direction substantiallyperpendicular to the screen 20. The screen protector 30 may stretchrelative to the screen 20 such that the screen protector 30 is in thestretchable state, at this time, the first distance from the top surface24 of the screen protector 30 to the bottom surface 14 of the housing 10makes a change from d1 to d1′. The second distance d2 from the topsurface 24 of the screen 20 to the bottom surface 14 of the housing 10keeps unchanged no matter the electronic device is in the falling stateor non-falling state. The first distance d1′ is greater than the seconddistance d2, that is, d1′>d2. In this embodiment, the screen protector30 may stretch for about 0.5 mm, and the difference between the d1′ andd2 may be about 0.3 mm. In this way, the top surface 32 of the screenprotector 30 may touch the floor 200, while the top surface 24 of thescreen 20 may not touch the floor 200, which could prevent the screen 20from being impacted by the floor 200.

In this embodiment, the screen protector 30 is arranged at acircumference of the screen 20, which may make it convenience toassemble the screen protector 30 to the housing 10 on one hand, on theother hand, may make the protection for the screen 20 more general andreliable. Specifically, the screen protector 30 could stretch to protectthe screen 20 reliably no matter what angle the electronic device iswhen it falls down.

It is understood that, since the screen protector 30 is arranged at theperiphery of the screen 20, on one hand, the screen protector 30 may beexposed outside, that is, the screen protector 30 may not be overlappedby the screen 20, no matter in stretchable state or in retractablestate, such that the screen protector 30 could be used as a middle frameof the electronic device. On the other hand, the screen protector 30could be arranged on the housing 10 and independent from the screen 20.Therefore, there is no need for the screen 20 to provide a location forthe screen protector 30, which could remain the integrity of the screen20.

In another embodiment, the electronic device may include a plurality ofscreens 20, the plurality of screens 20 may be embedded in a same sideof the housing 10 or in different sides of the housing 10.Correspondingly, the electronic device may include a plurality of screenprotectors 30 arranged at the circumference of each of the screens 20respectively. In some situations, when the plurality of screens 20 arereceived in the same side of the housing 10, one screen protector 30surrounding all of the screens 20 may be enough to protect the screens20.

In another embodiment, referring to FIGS. 9 and 10, the screen protector30 may include a plurality of sub-protectors 301, the plurality ofsub-protectors 301 are arranged along a circumference of the screen 20and spaced apart from each other. For example, the plurality ofsub-protectors 301 may be arranged on the four corners of the housing10. In still another embodiment, the plurality of sub-protectors 301 maybe arranged on opposite edges of the housing 10.

In still another embodiment, the screen protector 30 may be anelectrostatic protection tab. When the electronic device is in a fallingstate, the electrostatic protection tab may pop from the housing 10 toprotect the screen 20.

In still another embodiment, when the screen protector 30 is in thestretchable state, the screen protector 30 could rotate along thecircumference of the screen 20.

Referring to FIG. 15, the electronic device, according to an exemplaryembodiment, may further include a drive assembly 40 to drive the screenprotector 30 to stretch or retract. There are many ways for the driveassembly 40 to drive the screen protector 30, such as, elastic force ormagnetic force etc. In one embodiment, the drive assembly 40 may drivethe screen protector 30 by magnetic force.

Specifically, the drive assembly 40 may include at least one firstmagnetic component and at least one second magnetic component arrangedopposite to the first magnetic component. In one embodiment, the firstmagnetic component may be an electromagnetic component 42. The secondmagnetic component may be a permanent magnet 44. Please also referringto FIGS. 11 to 13, in order to increase the strength of magnetic force,the drive assembly 40 of this embodiment may include a plurality ofelectromagnetic components 42 mounted on the housing 10 and a pluralityof permanent magnets 44 mounted on the screen protector 30 and arrangedopposite to the plurality of electromagnetic components 42. Theplurality of electromagnetic components 42 and the plurality ofpermanent magnets 44 may have a one-on-one correspondence, as shown inFIGS. 14 and 15. The plurality of electromagnetic components 42 may beconnected to each other through a wire. Furthermore, in order to improvestationeriness of motion of the screen protector 30 driven by the driveassembly 40, the plurality of electromagnetic components 42 may bearranged along a circumference of the housing 10 and spaced apart fromeach other.

Directions of magnetic fields generated by the plurality ofelectromagnetic components 42 may be changed by changing currentdirection, so as to drive the screen protector 30 to switch between thestretchable state and the retractable state. It should be noted that,when current is provided to the electromagnetic components 42, theelectromagnetic components 42 may generate magnetic force. The screenprotector 30 may be switched from the retractable state to thestretchable state by changing current direction to control the directionof the magnetic force generated by the electromagnetic components 42 tothe permanent magnets 44.

It should be understood that when the electronic device is in a fallingstate, the current may be provided to the drive assembly 40, such thateach electromagnetic component 42 generates repulsion to thecorresponding permanent magnet 44. The permanent magnet 44 may move awayfrom the corresponding electromagnetic component 42 under the repulsion,whereby the screen protector 30 with the permanent magnet 44 therein maymove away from the housing 10 with the electromagnetic component 42therein. Thus the screen protector 30 is stretched to be in thestretchable state.

After the electronic device falls onto the floor or stop falling for acertain time, i.e. the electronic device is in a non-falling state,current having reverse direction may be provided to the electromagneticcomponent 42, the repulsion to the permanent magnet 44 may be changed tothe attraction to the permanent magnet 44. Under the attraction, thepermanent magnet 44 may move towards the electromagnetic component 42,whereby the screen protector 30 with the permanent magnet 44 thereinmoves towards the housing 10 with the electromagnetic component 42therein. Thus the screen protector 30 is retracted from the stretchablestate to the retractable state.

The drive assembly 40 in this embodiment drives the screen protector 30through the magnetic force between the electromagnetic components 42 andthe permanent magnets 44, which could realize a simple structure and areliable operation.

In another embodiment, the plurality of electromagnetic components 42may be received in the screen protector 30, while the plurality ofpermanent magnets 44 may be received in the housing 10, which is notlimited herein.

In this embodiment, each of the electromagnetic components 42 may be amagnetic coil, which is convenient for assembly and low in cost.Furthermore, magnetic force generated by the magnetic coil may beswitched between repulsion and attraction by changing the direction ofthe current provided to the magnetic coil, which is convenient andreliable.

In one embodiment, the screen protector 30 may define a plurality ofinstalling slots 36 (shown in FIG. 13) for accommodating the permanentmagnets 44. Each of the installing slots 36 may have an opening at thebottom surface 34 of the screen protector 30 and towards the housing 10.The housing 10 may define a plurality of installing grooves 16 (shown inFIG. 12) for receiving the electromagnetic components 42. Each of theinstalling grooves 16 may have an opening at a surface of the housing10, which contacting with the bottom surface 34 of the screen protector30, and towards the screen protector 30. The openings of the installingslots 36 may correspond to those of the installing grooves 16, such thatinteraction strength between the electromagnetic components 42 and thecorresponding permanent magnet 44 could be improved.

In one embodiment, as shown in FIG. 9, when the screen protector 30includes a plurality of sub-protectors 301, each of the plurality ofsub-protectors 301 may correspond to one electromagnetic component 42and a corresponding permanent magnet 44.

Referring to FIG. 16, in another embodiment, both the first magneticcomponent and the second magnetic component may be permanent magnets.The drive assembly 40 a may include a plurality of first permanentmagnets 46 mounted on the housing 10, a plurality of second permanentmagnets 48 mounted on the screen protector 30 and arranged opposite tothe plurality of first permanent magnets 46 and at least one motor 41connected to the plurality of first permanent magnets 46. The at leastone motor 41 is configured to drive the plurality of first permanentmagnets 46 to rotate to change directions of magnetic fields generatedby the plurality of first permanent magnets 46, so as to switch thescreen protector 30 between the stretchable state and the retractablestate.

The screen protector 30 may be buckled to the housing 10, which couldsimplify the structure of the electronic device, and make it moreconvenient to assemble the electronic device, thereby improving theassembly efficiency and reducing production cost.

Referring to FIGS. 17 and 18, in one embodiment, the screen protector 30may be buckled with the housing 10 by a plurality of locking mechanisms50 arranged between the screen protector 30 and the housing 10, suchthat the screen protector 30 could be attachable to and detachable fromthe housing 10, which may make it convenient for replacing the screenprotector 30.

The plurality of locking mechanisms 50 may be arranged along acircumference of the screen protector 30 and spaced apart from eachother, such that the screen protector 30 is buckled along thecircumference thereof, which may improve the stability and firmness ofthe assembly of the screen protector 30 and the housing 10.

Specifically, the housing 10 may further define a plurality of grooves18 along a circumference thereof, and have a bottom inner surface 11 ineach of the grooves 18. The screen protector 30 may surround the screen20 and further define a plurality of slots 38 arranged along acircumference thereof. The plurality of grooves 18 and the plurality ofslots 38 may have a one-on-one correspondence. Each of the grooves 18may be communicated with a corresponding slot 38.

In this embodiment, each of the locking mechanisms 50 may include alatching portion 52 arranged on the screen protector 30, a supportingportion 56 arranged on the housing 10 and a hook 54 configured toassemble the latching portion 52 and the supporting portion 56 together.

The hook 54, according to an exemplary embodiment, may include a mainbody 540 and a hook body 542 connected to the main body 540. The mainbody 540 may include an end connected to the hook body 542 and the otherend opposite to the end. The main body 540 may be arranged in the groove18 and be capable of moving in the groove 18. When the electronic deviceis in the non-falling state, the screen protector 30 is in the state,the other end of the main body 540 may contact with the bottom innersurface 11. When the electronic device is in the falling state, thescreen protector 30 may stretch relative to the screen 20, the hook 54may move with the stretching of the screen protector 30 and the otherend of the main body 540 may be away from the bottom inner surface 11,such that the screen protector 30 and the locking mechanisms 50 could beintegrated and simplify the structure of the electronic device. Itshould be noted that the hook 54 may be remained in the groove 18 nomatter the screen protector 30 is in the stretchable state or in theretractable state.

The hook body 542 may be engaged in the corresponding slot 38 and matchwith the latching portion 52. The supporting portion 56 may be under thelatching portion 52 and contact with the latching portion 52 such thatthe latching portion 52 is located and sandwiched between the hook body542 and the supporting portion 56. Therefore, the screen protector 30with the latching portion 52 and the housing 10 with the supportingportion 56 are assembled together.

In this embodiment, the hook body 542 engaged in the slot 36 may includea guiding inclined plane 544. The guiding inclined plane 544 could notonly guide the assembly of the housing 10 and the screen protector 30,but also reduce friction between the hook 54 and the latching portion52. The friction may be generated when the hook body 542 is beingengaged into the slot 36.

The latching portion 52 and the screen protector 30 may be formed of asingle piece. In another embodiment, the latching portion 52 may be anindependent component connected to the screen protector 30 by welding oradhering.

The supporting portion 56 and the housing 10 may be formed of a singlepiece. In another embodiment, the supporting portion 56 may also be anindependent component connected to the housing 10 by welding oradhering.

Referring to FIG. 12 and FIGS. 18-19, in order to make the connectionbetween the screen protector 30 and the housing 10 firmly, each of thelocking mechanisms 50, according to an exemplary embodiment, may furtherinclude a first elastic element 51 capable of contacting with the hookbody 542 and a second elastic element 53 received in the groove 18.

In this embodiment, the first elastic element 51 may have a lower end510 abutting against the hook body 542 and an upper end 512 abuttingagainst the bottom surface 22 of the screen 20. The first elasticelement 51 may be configured to provide a down pressure force toward thehook 54 along a direction substantially perpendicular to the screen 20,so as to press the hook 54 towards the supporting portion 56 to sandwichthe latching portion 52 firmly. When the electronic device is in thefalling state, the screen protector 30 may move away from the housing10, the hook 54 may move away from the bottom inner surface 11 with thescreen protector 30, the first elastic element 51 may be compressed.When the electronic device is in the non-falling state, the screenprotector 30 may be retracted from the stretchable state to theretractable state. The first elastic element 51 may provide elasticrestoring force to help the hook 54 to move toward the bottom innersurface 11, which could facilitate the moving of the screen protector 30toward the housing 10.

The first elastic element 51 may have a sheet configuration. In anotherembodiment, the first elastic element 51 may have a block configurationor other configurations. In still another embodiment, the first elasticelement 51 may be a spring.

Also referring to FIG. 12 and FIG. 18, the second elastic element 53,according to an exemplary embodiment, may have a first end 530 fixed onthe housing 10 and a second end 532 abutting against a surface of themain body 540 to press the main body 540 toward the supporting portion56 along a direction substantially parallel to the screen 20. The secondelastic element 53 of this embodiment may be an arched elastic tab,while in other embodiments, the second elastic element 53 may be aspring or have other configurations.

When the screen protector 30 is assembled to the housing 10, thelatching portion 52 may contact with the hook body 542 firstly and pressthe hook 54 along a direction substantially parallel to the screen 20and towards interior of the electronic device. Simultaneously, thesecond elastic element 53 may be compressed towards interior of theelectronic device. After the screen protector 30 is assembled to anappropriate position, the second elastic element 53 may provide elasticrestoring force to press the hook 54 towards the supporting portion 56,such that the hook body 542 could match with the latching portion 52firmly, thereby improving the stability of the assembly between thescreen protector 30 and the housing 10.

In one embodiment, it is the hook body 542 that abuts against the firstelastic element 51. In another embodiment, it may be the main body 540that abuts against the first element 51.

Referring to FIG. 20 together with FIGS. 17 and 18, each of the lockingmechanisms 50 of this embodiment may further include a positioning pin55 arranged on the screen protector 30 and extending downwardly from anend of the latching portion 52. The supporting portion 56 may define aplurality of positioning slots 57. The positioning pin 55 may be engagedin a corresponding positioning slot 57. An extending direction of thepositioning pin 55 may be substantially perpendicular to the screen 20.When the screen protector 30 is assembled to the housing 10, thepositioning pin 55 may have a guiding function, which could facilitatethe assembly between the screen protector 30 and the housing 10.

In this embodiment, a plurality of the positioning pins 55 may bearranged along a circumference of the screen protector 30, which maymake the assembly between screen protector 30 and housing 10 more stableand convenient, thereby improving the assembly efficiency of screenprotector 30.

It should be understood that, in another embodiment, the positioning pin55 may be arranged on the supporting portion 56, and the plurality ofpositioning slots 57 may be defined by the screen protector 30.

Since the positioning pin 55 extends in the direction substantiallyperpendicular to the screen 20, the screen protector 30 may stretch andretract along the direction substantially perpendicular to the screen 20under the guide of the positioning pin 55. When the electronic device isin the falling state, the screen protector 30 may move towards thedirection away from the bottom surface 11 of the housing 10, and thehook 54 may be detachable from the bottom inner surface 11 of thehousing 10 and press the first elastic element 51 towards the screen 20.When the electronic device is in the non-falling state, the screenprotector 30 may move towards the bottom surface 11 of the housing 10,and the elastic restoring force provided by the first elastic element 51may press the hook 54 toward the bottom surface 11 of the housing 10.Therefore, the integration of the screen protector 30 and the lockingmechanisms 50 could be further improved.

Referring to FIGS. 21 and 22, the sealing element 60, according to anexemplary embodiment, may be arranged between the screen protector 30and the main board 70 (shown in FIG. 2). The sealing element 60 may beadhered to the screen 20 by glue. The sealing element 60 may be bentfrom a circumference and extend along a direction substantiallyperpendicular to the screen 20 to form a bending potion 62, which couldseal the gap between the screen 20 and the housing 10. The sealingelement 60 could seal the electronic device to prevent dust or liquidfrom entering into the electronic device to affect the performance ofthe electronic device and damage the electronic device. In addition, thefirst elastic element 51 of this embodiment may be arranged on thesealing element 60.

Referring to FIG. 23, in this embodiment, the electronic device mayfurther include at least one sensor 80 and a controller 90 embedded inthe main board 70. The controller 90 may be received in the housing 10and electrically connected with the at least one sensor 80 and the driveassembly 40. The at least one sensor 80 may be configured to detectwhether the electronic device is getting close toward the object at aspeed greater than a preset value. In this embodiment, the at least onesensor 80 may be configured to detect whether the electronic device isin the falling state. The controller 80 may be configured to control thedrive assembly 40 to drive the screen protector 30 to move between thestretchable state and the retractable state in response to an output ofthe sensor. For example, the controller 80 of this embodiment may beconfigured drive the screen protector 30 to move from the retractablestate to the stretchable state when the electronic device is in thefalling state, or from the stretchable state to the retractable statewhen the electronic device is in the non-falling state.

In this embodiment, the at least one sensor 80 may include at least oneof gyroscope, accelerometer, gravity sensor, inertial sensor, camera,height sensor and motion sensor. In order to improve the accuracy andtimeliness of detecting the falling state of the electronic device, aplurality of sensors 80 could be arranged in the electronic device. Thesensors 80 could be selected according to actual requirement. Forexample, the electronic device may include a gyroscope and a gravitysensor, which could detect the state of the electronic device moresensitively and accurately.

For example, when the electronic device is in the falling state, thesensor 80 may detect the state of the electronic device, and transmitthe related information to the controller 90. After receiving theinformation, the controller 90 may control the drive assembly 40 todrive the screen protector 30 from the retractable state to thestretchable state to protect the screen 20, which could make the screenprotector 30 protect the screen 20 more flexibly and reliably.

In other embodiments, the controller 90 may control the drive assembly40 to run at a regular time, so as to drive the screen protector 30 toswitch from the retractable state to the stretchable state at theregular time, such that the electronic device could realize a massagefunction and a vibration function.

The following is an introducing of operating mechanism of the screenprotector 30 combining with the drive assembly 40 and the lockingmechanisms 50.

When the electronic device is in the non-falling state, the screenprotector 30 may be in the retractable state, and there may be nocurrent provided to the electromagnetic components 42. At this time, thefirst elastic element 51 may be in a compressed state and provideelastic restoring force to the hook 54 such that the hook 54 is pressedtoward the bottom inner surface 18 of the housing 10, thereby keepingthe screen protector 30 connecting with the housing 10 and keeping thescreen protector 30 in the retractable state.

When the sensor 80 detects that the electronic device is in the fallingstate, the sensor 80 may transmit the related information to thecontroller 80. The controller 80 may provide current to theelectromagnetic components 42. Then the electromagnetic components 42may generate repulsion to the permanent magnet 44. Under the repulsionand the guide of the positioning pin 55, the permanent magnet 44 maymove along the direction substantially perpendicular to the screen 20and away from the electromagnetic components 42, which may make thescreen protector 30 move along the direction substantially perpendicularto the screen 20 and away from the housing 10, such that the screenprotector 30 is stretched to the stretchable state to touch the floor200 and prevent the screen 20 from touching the floor 200. As a result,impact energy is redirected from the screen 20 to the screen protector30, thereby protecting the screen 20 effectively. At this time, the hook54 may move with the moving of the screen protector 30, detachable fromthe bottom inner surface 11 and further compress the first elasticelement 51.

When the sensor 80 detects that the electronic device is in thenon-falling state, that is, the electronic device stops falling, thesensor 80 may transmit the related information to the controller 90.Then the controller 90 may provide current having the reverse directionto the electromagnetic components 42. Then the electromagneticcomponents 42 may generate attraction to the permanent magnet 44. Underthe attraction and the guide of the positioning pin 55, the permanentmagnet 44 may move along the direction substantially perpendicular tothe screen 20 and towards the electromagnetic components 42, which maymake the screen protector 30 move along the direction substantiallyperpendicular to the screen 20 and towards the housing 10, such that thescreen protector 30 is retracted to the retractable state. At the sametime, the first elastic element 51 may provide elastic restoring forceto press the hook 54 towards the bottom inner surface 11 of the housing10, so as to help the screen protector 30 returns to the retractablestate.

In another embodiment, a rib (not shown) may be provided on one of thescreen protector 30 and the housing 10, while the other one of thescreen protector 30 and the housing 10 may define an embedding slot (notshown) matching with the rib. The matching between the rib and theembedding slot may improve the fastness of the assembly between thescreen protector 30 and the housing 10, thereby preventing making noisebetween the screen protector 30 and the housing 10.

In another embodiment, a protect film (not shown) may be providedbetween the screen protector 30 and the housing 10, the protect film maybe adhered on the surface of the housing facing the screen protector 30.In this way, the protect film could, on one hand, protect theelectromagnetic components 42 embedded in the housing 10, on the otherhand, improve the integrity of the housing 10.

In another embodiment, an elastic protector (not shown) may be arrangedbetween the screen protector 30 and the housing 10. An end of theelastic protector may be detachable to the screen protector 30, theother end of the elastic protector may be detachable to the housing 10.When the screen protector 30 is in the retractable state, the elasticprotector may also in a retractable state. When the screen protector 30is in stretchable state, the elastic protector may pop out and form acambered surface in the gap between the screen protector 30 and thehousing 10, which could improve the integrity of the electronic device.

In still another embodiment, there may be an elastic sealing element(not shown) arranged between the screen protector 30 and the housing 10.When the screen protector 30 is in stretchable state, the elasticsealing element may seal the gap between the screen protector 30 and thehousing 10 so as to prevent external impurities or liquid from enteringinto the electronic device to damage the electronic device, which couldimprove the sealing of the electronic device.

In addition, foam may be provided between the screen protector 30 andthe housing 10. When the electronic device drops, the foam may slow downthe impact of the floor, whereby the foam may further protect the screen20.

The present disclosure further provides a method for protecting a screenof an electronic device. In this embodiment, the electronic device mayinclude the shell 10, the screen 20 embedded in the shell 10, the screenprotector 30 connected to the shell 10 and arranged at a circumferenceof the screen 20, the drive assembly 40, the sensor 80 and thecontroller 90 connected to the shell 10 and electrically connected withthe sensor 80.

Specifically, the screen protector 30 may be configured to stretch orretract relative to the screen 20 such that the screen protector 30 isin the stretchable state or in the retractable state. When the screen 20is falling down toward an object, the screen protector 30 may beconfigured to stretch relative to the screen 20 and be in thestretchable state such that the screen protector 30 touches the objectto prevent the screen 20 from touching the object. When the screen 20 isin a non-falling state, the screen protector 30 may be in theretractable state. The drive assembly 40 may be configured to drive thescreen protector 30 to switch between the stretchable state and theretractable state by magnetic force. The sensor 80 may be configured todetect whether the electronic device is in a falling state. Thecontroller 90 may be configured to control the drive assembly 40 todrive the screen protector 30 to switch between the stretchable stateand the retractable state. The shell 10, the screen 20, the screenprotector 30, the drive assembly 40, the sensor 80, the controller 90and the operating mechanism thereof may be those described previously,which will not be described in detail.

The method of this embodiment may include the following blocks.

At block 101, the sensor may detect whether the electronic device is inthe falling state.

At block 102, the controller may control the drive assembly to drive thescreen protector to switch from the retractable state to the stretchablestate when the electronic device is in the falling state.

In another embodiment, the method may include the following blocks.

At block 201, the sensor may detect whether the electronic device is inthe falling state.

At block 202, the controller may control the drive assembly to drive thescreen protector to switch from the retractable state to the stretchablestate when the electronic device is in the falling state.

At block 203, the controller may control the drive assembly to drive thescreen protector to switch from the stretchable state to the retractablestate when the electronic device is detected in the non-falling statebeyond a specific time.

Specifically, the specific time may be 5 seconds, 10 seconds or 30seconds. The electronic device is detected in the non-falling statebeyond the specific time may mean that the electronic device may notfall and may be safe, at this time, the screen protector 30 couldretract to the retractable state.

Taking the electronic device as a mobile phone for an example, in oneembodiment, the mobile phone may include the housing 10, the screen 20and the screen protector 30 as previously described. The mobile phonemay further include a RF circuit, a memory, an input unit, a Wi-Fimodule, display assembly, sensors, audio circuits, a processor, afingerprint assembly and a power supply, which are not illustrated withnumbers in drawings.The RF circuit may be configured to receive and transmit information. Inspecial, the RF circuit sends downlink information to the processorafter receiving the downlink information from a base station, andtransmits uplink data to the base station. Usually, the RF circuitincludes, but is not limited to, an antenna, at least one amplifier, atransceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer and soon. In addition, the RF circuit may further communicate with otherdevices via wireless communication and a network. The wirelesscommunication may use any one communication standard or protocol,including, but not limited to, Global System of Mobile communication(GSM), General Packet Radio Service (GPRS), Code Division MultipleAccess (CDMA), Wideband Code Division Multiple Access (WCDMA), Long TermEvolution (LTE), E-mail, Short Messaging Service (SMS) and so on.The memory may be configured to store software programs and modules, andthe processor executes various function applications and data processingof the mobile phone by running the software programs and the modulesstored in the memory. The memory may mainly include a program storageregion and a data storage region, the storage program region may storean operation system, application programs for at least one function (apower manager service (PMS) wake-up function, a fingerprint dataacquisition function, a feature point matching function, and a displaylighting function) and so on; and the data storage region may store data(such as fingerprint data obtained by a fingerprint recognition sensor,pre-stored preset quick unlocking period, statistical information ofscreen-off unlocking period and so on) created according to use of themobile phone. In addition, the memory may include a high-speed RAM, andmay further include a non-volatile memory such as one of at least a diskstorage device, a flash device, or other non-volatile solid storagedevices.

The input unit may be configured to receive input digital or characterinformation and generate key signal input associated with user settingand functional control of the mobile phone. Specifically, the input unitmay include a touch panel and other input devices. The touch panel isalso named as touch screen, which is configured to collect touchoperations thereon or there-near (such as operations by users' fingers,a touch pen and the like), and drive corresponding connection devicesaccording to preset programs. Optionally, the touch panel may includetwo parts: a touch detection apparatus and a touch controller. The touchdetection apparatus detects a touch operation by a user, converts thedetected touch operation into an electrical signal, and transmits theelectrical signal to the touch controller. The touch controller receivesthe electrical signal from the touch detection apparatus, converts theelectrical signal into coordinates of a touch point, and then sends thecoordinates to the processor. The touch controller may also receive andexecute a command sent by the processor. In addition, the touch panelmay be a resistive, capacitive, infrared (Infrared), or surface acousticwave touch panel. The other input devices may include, but are notlimited to, one or more of a physical keyboard, a functional key (suchas a volume control key and a switch key), a track ball, a mouse, and anoperating rod.

The touch panel can cover the display panel 220, when the touchoperation on or near the touch panel is detected, the touch panel willtransmit the touch operation to the processor to determine the type oftouch event; thereafter, the processor can provide a correspondingvisual output on the display panel according to the type of the touchevent.

The display assembly may include a display panel including LiquidCrystal Display (LCD), an Organic Light-Emitting Diode (OLED) and thelike. In addition, the touch panel may cover the display panel, and whenthe touch panel detects the touch operation on or near it, the touchpanel may transmit corresponding information to the processor todetermine the type of touch event. Then the processor provides thecorresponding visual output on the display panel based on the type oftouch event.

The fingerprint assembly may recognize the user's fingerprintinformation and transmit the information to a control assembly (forexample, a processor) of the electronic device when the user'sfingerprint approaches the fingerprint assembly. The control assemblymay send a corresponding instruction based on the fingerprintinformation. The fingerprint is unique and cannot change for thelifetime, thereby improving the privacy of the electronic device due tothe provision of the fingerprint assembly.

The audio circuits, speakers, and microphones can provide an audiointerface between the user and the phone. The audio circuit can convertthe audio data received into electronic signals, and transmit theelectronic signals to the speaker, whereby the speaker can convert theelectronic signals to sound signals for output. Moreover, a microphonecan convert the sound signal received to electronic signals which willbe converted into audio data after reception by the audio circuit. Theaudio circuit output the audio data to the processor, after processing,the processor can transmit the audio data to another mobile phone viathe RF circuit, or, the processor can output the audio data to thememory for further process.

Wi-Fi belongs to a short-range wireless transmission technology, themobile phone may assist the user in E-mail receiving and sending,webpage browsing, access to streaming media and the like by means of theWi-Fi module, and it provides a wireless wideband internet access forthe user. However, it may be understood that the Wi-Fi module can beoptional components of the mobile phone and can totally be omittedwithout changing the essence of the present disclosure as required.

The processor is a control center of the mobile phone, and it isconfigured to connect all parts of the mobile phone by utilizing variousinterfaces and lines, to run or execute the software program and/or themodule stored in the memory and call data stored in the memory toexecute various functions and processing data of the mobile phone, so asto wholly monitor the mobile phone. Alternatively, the processor mayinclude one or more processing units. The processor may be integratedwith an application processor and a modulation-demodulation processor,the application processor mainly processes an operation system, a userinterface, an application program and the like, and themodulation-demodulation processor mainly processes wirelesscommunication. It should be understood that the modulation-demodulationprocessor may not be integrated into the processor.

The power supply (such as a battery) for supplying power to eachcomponent. The power supply may be connected with the processorlogically via a power supply management system, so as to implementfunctions of charging, discharging, and power consumption management bymeans of the power supply management system. The mobile phone mayfurther include a camera, a Bluetooth module and the like, which are notillustrated, and will not be elaborated herein.

It could be understood that, one skilled in the art may make anyequivalence or modification based on the technical solution and theinventive concept of the present disclosure. All these modifications andequivalences shall all be covered within the protection claimed in theclaims of the present disclosure.

What is claimed is:
 1. An electronic device, comprising: a housing; atleast one screen, received in the housing; at least one screen protectorconnected to the housing and configured to stretch or retract relativeto the at least one screen such that the at least one screen protectormoves between a stretchable state and a retractable state, wherein whenthe at least one screen is getting close toward an object at a speedgreater than a preset value, the at least one screen protector stretchesrelative to the at least one screen to be in the stretchable state, suchthat the at least one screen protector touches the object to protect theat least one screen from touching the object; a drive assembly,comprising a first magnetic component and a second magnetic componentarranged opposite to the first magnetic component, wherein the firstmagnetic component is received in the housing, the second magneticcomponent is received in the at least one screen protector, the driveassembly is configured to drive the at least one screen protector tomove between the stretchable state and the retractable state by magneticforce between the first magnetic component and the second magneticcomponent; and a plurality of locking mechanisms between the at leastone screen protector and the housing to buckle the at least one screenprotector with the housing; wherein the housing defines a plurality ofgrooves along a circumference thereof, the at least one screen protectorsurrounds the at least one screen and defines a plurality of slotsarranged along a circumference thereof, the plurality of grooves and theplurality of slots have a one-on-one correspondence, each of the groovesis communicated with a corresponding slot, the housing has a bottominner surface in the groove; each of the locking mechanisms comprises: alatching portion arranged on the at least one of the screen protector; ahook comprising a main body arranged in the groove and contacting withthe bottom inner surface and a hook body engaged in the correspondingslot and matching with the latching portion; and a supporting portionarranged on the housing and in contact with the latching portion suchthat the latching portion is located between the hook body and thesupporting portion.
 2. The electronic device of claim 1, wherein the atleast one screen is flat and comprises a top surface; the at least onescreen protector comprises a top surface and a bottom surface oppositeto the top surface along a direction substantially perpendicular to theat least one screen, the top surface of the at least one screenprotector is farther from a bottom surface of the housing than thebottom surface of the at least one screen protector; when the at leastone screen protector is in the retractable state, a first distance fromthe top surface of the at least one screen protector to the bottomsurface of the housing is less than or equal to a second distance fromthe top surface of the at least one screen to the bottom surface of thehousing; when the at least one screen protector is in the stretchablestate, the first distance is greater than the second distance.
 3. Theelectronic device of claim 2, wherein each of the locking mechanismsfurther comprises a first elastic element and a second elastic elementwhich are received in the groove; wherein the first elastic element hasa first end abutting against the hook body and a second end abuttingagainst a bottom surface of the at least one screen, the first elasticelement is configured to provide a pressure force toward the hook alonga direction substantially perpendicular to the at least one screen; andthe second elastic element has a first end fixed on the housing and asecond end abutting against a surface of the main body to press the mainbody toward the supporting portion along a direction substantiallyparallel to the at least one screen.
 4. The electronic device of claim3, wherein each of the locking mechanisms further comprises apositioning pin arranged on one of the supporting portion and the atleast one screen protector; the other one of the supporting portion andthe at least one screen protector defines a plurality of positioningslots; wherein the positioning pin is engaged in a correspondingpositioning slot, an extending direction of the positioning pin issubstantially perpendicular to the at least one screen.
 5. Theelectronic device of claim 4, wherein when the at least one screenprotector is in the stretchable state, the at least one screen protectormoves toward a direction away from the bottom surface of the housingwith the hook detachable from the bottom inner surface of the housing,the hook presses the first elastic element toward the at least onescreen.
 6. The electronic device of claim 1, wherein the first magneticcomponent comprises a plurality of electromagnetic components receivedin the housing, the plurality of electromagnetic components are arrangedalong a circumference of the housing and spaced apart from each other;the second magnetic component comprises a plurality of permanent magnetsprovided on the at least one screen protector, the plurality ofpermanent magnets and the plurality of electromagnetic components have aone-on-one correspondence.
 7. The electronic device of claim 1, furthercomprising: at least one sensor, configured to detect whether theelectronic device is getting close toward the object at the speedgreater than the preset value; and a controller, configured to controlthe drive assembly to drive the at least one screen protector to movefrom the retractable state to the stretchable state when the electronicdevice is getting close toward the object at the speed greater than thepreset value, or from the stretchable state to the retractable statewhen the electronic device is getting close toward the object at a speedless than the preset value.
 8. The electronic device of claim 7, whereinthe at least one sensor comprises at least one of gyroscope,accelerometer, gravity sensor, inertial sensor, camera, height sensorand motion sensor.
 9. The electronic device of claim 1, furthercomprising a sealing element arranged between the at least one screenprotector and the housing.
 10. The electronic device of claim 1, whereinthe at least one screen protector comprises a plurality ofsub-protectors, the plurality of sub-protectors are arranged along acircumference of the at least one screen and spaced apart from eachother, each of the plurality of sub-protectors corresponds to the firstmagnetic component and the second magnetic component.
 11. The electronicdevice of claim 1, wherein the first magnetic component is a magneticcoil.
 12. An electronic device, comprising: a shell; a screen mounted inthe shell; a screen protector connected to the shell and arranged at aperiphery of the screen, an inner surface of the screen protectorcontacts with an outer side surface of the screen, the screen protectoris configured to stretch or retract relative to the screen such that thescreen protector moves between a stretchable state and a retractablestate; a controller, received in the housing and electrically connectedwith a sensor, the controller is configured to control the screenprotector to stretch relative to the screen along a directionsubstantially perpendicular to the screen to be in the stretchable inresponse to an output of the sensor, such that the screen protectorprotrudes relative to the screen to protect the screen; a plurality offirst permanent magnets mounted on the housing; a plurality of secondpermanent magnets mounted on the screen protector and arranged oppositeto the plurality of first permanent magnets; and at least one motorconnected to the plurality of first permanent magnets, wherein the atleast one motor is configured to drive the plurality of first permanentmagnets to rotate to change directions of magnetic fields generated bythe plurality of first permanent magnets, so as to switch the screenprotector between the stretchable state and the retractable state. 13.The electronic device of claim 12, wherein when the screen protector isin the retractable state, the screen protector is leveled with or belowthe screen, when the screen protector is in the stretchable state, thescreen protector is above the screen.
 14. The electronic device of claim12, wherein the screen protector has a shape of rectangular or longround, and surrounds the screen.
 15. An electronic device, comprising: ashell; a screen mounted in the shell; a screen protector connected tothe shell and configured to stretch or retract relative to the screensuch that the screen protector moves between a stretchable state and aretractable state, wherein when the screen protector is in theretractable state, the screen protector is leveled with or below thescreen, and when the screen protector is in the stretchable state, thescreen protector is above the screen; a drive assembly, comprising afirst magnetic component and a second magnetic component arrangedopposite to the first magnetic component, wherein the first magneticcomponent is received in the housing, the second magnetic component isreceived in the screen protector, the drive assembly is configured todrive the screen protector to move between the stretchable state and theretractable state by magnetic force; a controller, received in the shelland electrically connected with a sensor, the controller is configuredto control the drive assembly to drive the screen protector to movebetween the stretchable state and the retractable state in response toan output of the sensor; and a plurality of locking mechanisms betweenthe at least one screen protector and the housing to buckle the at leastone screen protector with the housing; wherein the housing defines aplurality of grooves along a circumference thereof, the at least onescreen protector surrounds the at least one screen and defines aplurality of slots arranged along a circumference thereof, the pluralityof grooves and the plurality of slots have a one-on-one correspondence,each of the grooves is communicated with a corresponding slot, thehousing has a bottom inner surface in the groove; each of the lockingmechanisms comprises: a latching portion arranged on the at least one ofthe screen protector; a hook comprising a main body arranged in thegroove and contacting with the bottom inner surface and a hook bodyengaged in the corresponding slot and matching with the latchingportion; and a supporting portion arranged on the housing and in contactwith the latching portion such that the latching portion is locatedbetween the hook body and the supporting portion.